module UsersHelper
	#Returns the Gravatar(http://gravatar.com/) for the given user.
	def gravatar_for(user, options = {size: 50})
		gravatar_id = Digest::MD5::hexdigest(user.email.downcase)
		size = options[:size]
		gravatar_url = "https://secure.gravatar.com/avatar/#{gravatar_id}"
		image_tag(gravatar_url,alt:user.name,class:"gravatar")
	end
end
